Providing teachers with data-driven feedback, aligned professional development and opportunities for advancement may help limit attrition, contribute to more effective teaching, and improve student learning. However, research shows that much of the professional development teachers currently receive does not improve either teacher or student…

Teachers have the greatest school-based effect on the achievement of any child in their classrooms, but highly effective principals can positively affect the achievement of every student in their schools. The difference between a highly effective principal and an average one is equal to two-to-seven months of extra learning per year for each child…